A novel idea of using compact filamentary and printed circuit board (PCB) planar spiral coils for the magnetic induction (MI) based underground (UG) communication to achieve high received power and enhanced transmission distance is proposed. In the existing system, non-planar coils were employed as transceivers which lost their function due to their huge size and deployment difficulty. An enhanced MI UG channel model is proposed to accurately investigate the UG medium’s influence on the MI system performance by considering various soil properties that were considered negligible in the earlier models. An analytical approach to calculate self-inductance and mutual inductance of circular and square coils of filamentary planar and PCB planar spiral coils are described from which the communication parameters such as received power, path-loss, and signal-to-ratio are derived. The simulation results reveal that in both filamentary and PCB planar spiral coil, the square shape coil performs better than the circular coil. The filamentary planar spiral square coil (FPSSC) achieves 26.15% higher received power than the PCB planar spiral square coil (PPSSC) due to the former coil’s low resistance and strong mutual coupling. Further, the influence of coil parameters, coil misalignment, and soil properties on the received power is studied for both FPSSC and PPSSC systems, and their major performance influencing parameters are identified. The received power of the proposed FPSSC system exhibits a significant improvement of 31.24% as compared to the traditional non-planar MI coil system.

提出了使用紧凑的丝状和印刷电路板（PCB）平面螺旋线圈进行基于磁感应（MI）的地下（UG）通信以实现高接收功率和增强的传输距离的新想法。在现有系统中，非平面线圈被用作收发器，由于其巨大的尺寸和部署困难，其失去了功能。提出了一种增强型MI UG通道模型，以通过考虑在早期模型中可以忽略的各种土壤特性来准确调查UG介质对MI系统性能的影响。描述了一种计算丝状平面和PCB平面螺旋线圈的圆形和方形线圈的自感和互感的分析方法，从中可以得出通信参数，例如接收功率，路径损耗，得出信噪比和信噪比。仿真结果表明，在丝状和PCB平面螺旋线圈中，方形线圈的性能均优于圆形线圈。丝状平面螺旋方形线圈（FPSSC）的接收功率比PCB平面螺旋方形线圈（PPSSC）高26.15％，这是由于前者线圈的低电阻和强大的互耦性。此外，对于FPSSC和PPSSC系统，研究了线圈参数，线圈未对准和土壤特性对接收功率的影响，并确定了它们的主要性能影响参数。与传统的非平面MI线圈系统相比，所提出的FPSSC系统的接收功率显着提高了31.24％。方形线圈的性能优于圆形线圈。丝状平面螺旋方形线圈（FPSSC）的接收功率比PCB平面螺旋方形线圈（PPSSC）高26.15％，这是由于前者线圈的低电阻和强大的互耦性。此外，对于FPSSC和PPSSC系统，研究了线圈参数，线圈未对准和土壤特性对接收功率的影响，并确定了它们的主要性能影响参数。与传统的非平面MI线圈系统相比，所提出的FPSSC系统的接收功率显着提高了31.24％。方形线圈的性能优于圆形线圈。丝状平面螺旋方形线圈（FPSSC）的接收功率比PCB平面螺旋方形线圈（PPSSC）高26.15％，这是由于前者线圈的低电阻和强大的互耦性。此外，对于FPSSC和PPSSC系统，研究了线圈参数，线圈未对准和土壤特性对接收功率的影响，并确定了它们的主要性能影响参数。与传统的非平面MI线圈系统相比，所提出的FPSSC系统的接收功率显着提高了31.24％。由于前者线圈的低电阻和强大的互耦性，因此其接收功率比PCB平面螺旋方形线圈（PPSSC）高15％。此外，对于FPSSC和PPSSC系统，研究了线圈参数，线圈未对准和土壤特性对接收功率的影响，并确定了它们的主要性能影响参数。与传统的非平面MI线圈系统相比，所提出的FPSSC系统的接收功率显着提高了31.24％。由于前者线圈的低电阻和强大的互耦性，因此其接收功率比PCB平面螺旋方形线圈（PPSSC）高15％。此外，对于FPSSC和PPSSC系统，研究了线圈参数，线圈未对准和土壤特性对接收功率的影响，并确定了它们的主要性能影响参数。与传统的非平面MI线圈系统相比，所提出的FPSSC系统的接收功率显着提高了31.24％。